Unix Timestamp Converter Online (Free)

Unix timestamps count seconds (or milliseconds) since January 1, 1970 UTC. APIs, databases, and JWT exp claims use them — converting to human time makes debugging much easier.

Timestamp workbench tabs

• Timestamp → Date — relative badge plus local, ISO, and UTC
• Date → Timestamp — seconds and milliseconds output
• Auto-detect 10-digit seconds vs 13-digit milliseconds
• Use current time with one click